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Step 14LCD Add-On
While working on this project I had a few questions and directed them to Graham Davies of Ecros Tech. He was quite helpful and even offered to send me the two add-on kits I didn't have, the LCD and Ribbon Cable kits. Thanks Graham!
Because I received the LCD Add-on kit after completing this instructable without it, this step will install all parts necessary for the LCD kit. It's rather simple actually.
Decision: How to deal with th R/W bit of the LCD interface. The Dragon Rider PCB has a set of solder pads for choosing between connecting the RW bit to a pull-down resistor or to the pin header for connection to a microcontroller. You can make the decision now and solder a wire jumper in the appropriate place. I decided to keep my options open and install a pin header for use with a shunt. This will allow me to change my mind later without desoldering. I had enough pins left over from the basic parts kit to use here, just add your own shunt (although there are probably enough between the basic and advanced parts kits that you don't need to find an additional shunt either).
1. Place and solder the resistors and trim-pot
Because I received the LCD Add-on kit after completing this instructable without it, this step will install all parts necessary for the LCD kit. It's rather simple actually.
Decision: How to deal with th R/W bit of the LCD interface. The Dragon Rider PCB has a set of solder pads for choosing between connecting the RW bit to a pull-down resistor or to the pin header for connection to a microcontroller. You can make the decision now and solder a wire jumper in the appropriate place. I decided to keep my options open and install a pin header for use with a shunt. This will allow me to change my mind later without desoldering. I had enough pins left over from the basic parts kit to use here, just add your own shunt (although there are probably enough between the basic and advanced parts kits that you don't need to find an additional shunt either).
1. Place and solder the resistors and trim-pot
- Be mindful of your resistor color codes.
- Place R7, R8, R9 and solder using the same methods as earlier in this assembly process
- Place a 1x3 pin header in the three holes marked "PLDN" "R/W" "BIT1"
- Solder using the same method we have previously for single-row pin headers.
- Nylon stands offs come with a screw, washer, and nut.
- Install the posts with the screw side up.
- The washer goes on top of the board (as a spacer for proper height). Secure the post from the bottom of the board using the nut.
- Put the 1x14 pin header and the 1x16 pin socket together. The two extra slots for the socket go on the "pin1" side of the board. Insert into the holes on the PCB.
- Set the LCD in place making sure the pin socket pins line up with the holes of the LCD's board.
- Secure in place using the nylon screws. This ensures proper alignment during soldering.
- Start with one pin on the Dragon Rider and one pin on the LCD.
- Check for proper alignment
- Solder the remaining pins.
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